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