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)(19,28)(20,25)(21,35)(22,27)(23,26)(24,32)(29,43)(30,39)(31,38)(33,40)(34,42)(36,41)(37,46)(44,48)(45,47)(1,3,5,4)(2,6,7,8)(9,10)(11,14)(12,13)(15,16)(17,19)(18,24)(20,29)(21,31)(22,32)(23,30)(25,37)(26,38)(27,28)(33,46)(34,45)(35,39)(36,44)(40,43)(41,47)(42,48)(1,4,5,3)(2,6,7,8)(10,13)(14,16)(17,20)(18,25)(19,29)(21,36)(22,33)(23,34)(24,37)(26,42)(27,40)(28,43)(30,45)(31,44)(32,46)(35,41)(38,48)(39,47)(10,13)(14,16)(19,30)(20,33)(21,23)(24,38)(25,40)(26,35)(28,39)(29,44)(31,32)(37,47)(43,48)(45,46) involution — undirected(2,7)(6,8)(9,11,12,15)(10,14,13,16)(17,21,22,23)(18,26,27,35)(19,31,32,30)(20,34,33,36)(24,38,28,39)(25,41,40,42)(29,45,46,44)(37,47,43,48)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.