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