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