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