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