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