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