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