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