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