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