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