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