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