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