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