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