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