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