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