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