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