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)(17,18,22,24)(19,25,26,20)(21,23,31,32)(27,30,29,28)(1,2,5,3)(4,7,8,6)(9,11,13,16)(10,14,12,15)(17,19)(18,20)(21,29)(22,26)(23,30)(24,25)(27,31)(28,32)(2,3)(6,7)(19,26)(20,25)(27,29)(28,30) involution — undirected(1,2,5,3)(4,6,8,7)(17,18)(19,20)(21,23)(22,24)(25,26)(27,28)(29,30)(31,32)(1,3,5,2)(4,6,8,7)(17,20)(18,19)(21,30)(22,25)(23,29)(24,26)(27,32)(28,31)(1,4)(2,6)(3,7)(5,8)(9,12,13,10)(11,15,16,14)(17,21,22,31)(18,23,24,32)(19,27,26,29)(20,28,25,30)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.