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