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