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