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