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