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