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