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