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