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