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