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