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