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