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