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