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