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