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