One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,8)(3,10,13,7)(4,9,14,12)(5,15,16,11)(17,18,23,25)(19,28,29,24)(20,30,27,22)(21,26,31,32)(33,34)(35,40)(36,41)(37,42)(38,39)(43,47)(44,48)(45,46)(1,3)(2,7)(4,11)(5,12)(6,13)(8,10)(9,16)(14,15)(17,19)(18,24)(20,21)(22,26)(23,29)(25,28)(27,31)(30,32)(34,39)(40,41)(42,45)(47,48) involution — undirected(2,8)(4,14)(7,10)(11,15)(18,25)(19,29)(20,27)(26,32)(33,35,38,36)(34,40,39,41)(37,43,46,44)(42,47,45,48)(1,4,6,14)(2,9,8,12)(3,11,13,15)(5,7,16,10)(17,20,23,27)(18,22,25,30)(19,21,29,31)(24,26,28,32)(33,36,38,35)(34,41,39,40)(37,44,46,43)(42,48,45,47)(1,3)(2,10)(4,11)(5,9)(6,13)(7,8)(12,16)(14,15)(17,21)(18,26)(19,27)(20,29)(22,28)(23,31)(24,30)(25,32)(33,34)(35,40)(36,41)(37,45)(38,39)(42,46)(43,48)(44,47) involution — undirected(1,5)(2,11)(3,12)(4,7)(6,16)(8,15)(9,13)(10,14)(17,22)(18,27)(19,26)(20,25)(21,28)(23,30)(24,31)(29,32)(33,37)(34,42)(35,43)(36,44)(38,46)(39,45)(40,47)(41,48) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.