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