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