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