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