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