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