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