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