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)(17,18,23,20)(19,29,32,25)(21,26,36,34)(22,27,24,28)(30,33,41,38)(31,43,46,40)(35,39,42,37)(44,47,48,45)(1,3,5,4)(2,6,8,7)(9,11,13,12)(10,14,15,16)(17,19)(18,25)(20,29)(21,31)(22,33)(23,32)(24,38)(26,40)(27,30)(28,41)(34,43)(35,44)(36,46)(37,47)(39,45)(42,48)(1,3,5,4)(2,7,8,6)(10,15)(14,16)(17,20,23,18)(19,30,32,41)(21,35,36,42)(22,27,24,28)(25,38,29,33)(26,39,34,37)(31,43,46,40)(44,45,48,47)(9,12,13,11)(10,16,15,14)(17,21)(18,26)(19,31)(20,34)(22,37)(23,36)(24,39)(25,40)(27,35)(28,42)(29,43)(30,44)(32,46)(33,47)(38,45)(41,48)(1,4,5,3)(2,6,8,7)(17,22)(18,27)(19,32)(20,28)(23,24)(25,29)(31,45)(35,42)(37,39)(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.