One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,6,10,14)(4,7,12,11)(9,13,16,15)(17,18,22,25)(19,24,26,23)(20,29,30,21)(27,28,32,31)(33,34,38,39)(35,41,36,40)(37,42,46,45)(43,48,44,47)(1,2)(3,6)(4,7)(5,8)(9,13)(10,14)(11,12)(15,16)(19,26)(23,24)(27,32)(28,31)(34,39)(40,41)(42,45)(47,48) involution — undirected(17,19)(18,23)(20,27)(21,28)(22,26)(24,25)(29,31)(30,32)(33,35,38,36)(34,40,39,41)(37,43,46,44)(42,47,45,48)(1,2)(3,6)(4,11)(5,8)(7,12)(9,15)(10,14)(13,16)(17,19)(18,24)(20,27)(21,31)(22,26)(23,25)(28,29)(30,32)(33,34)(35,40)(36,41)(37,45)(38,39)(42,46)(43,48)(44,47) involution — undirected(1,3,5,10)(2,6,8,14)(4,9,12,16)(7,13,11,15)(17,20)(18,21)(19,27)(22,30)(23,28)(24,31)(25,29)(26,32)(33,36,38,35)(34,41,39,40)(37,44,46,43)(42,48,45,47)(1,4)(2,7)(3,9)(5,12)(6,13)(8,11)(10,16)(14,15)(17,21)(18,20)(19,28)(22,29)(23,27)(24,32)(25,30)(26,31)(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.