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