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