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