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