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