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