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