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