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