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