One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,6,4,7)(9,10)(11,12)(13,15)(14,16)(17,18,23,20)(19,27,28,24)(21,25,31,30)(22,29,32,26)(1,2)(3,6)(4,7)(5,8)(17,19,23,28)(18,24,20,27)(21,29,31,26)(22,30,32,25)(9,11,14,13)(10,15,16,12)(19,28)(21,31)(24,27)(25,30)(1,3,5,4)(2,6,8,7)(9,12,14,15)(10,11,16,13)(17,20,23,18)(19,27,28,24)(21,30,31,25)(22,29,32,26)(1,3,5,4)(2,6,8,7)(9,13,14,11)(10,15,16,12)(17,21,23,31)(18,25,20,30)(19,29,28,26)(22,27,32,24)(1,4,5,3)(2,7,8,6)(17,22,23,32)(18,26,20,29)(19,30,28,25)(21,27,31,24)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.