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