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)(11,13)(12,14)(15,16)(17,18,22,26,21,28,20,27)(19,25,29,23,31,24,30,32)(9,11)(10,13)(12,15)(14,16)(17,19,21,31)(18,23,28,32)(20,29,22,30)(24,26,25,27)(2,5)(6,8)(10,14)(11,15)(17,19)(18,24)(20,30)(21,31)(22,29)(23,27)(25,28)(26,32) involution — undirected(1,3,4,7)(2,6,5,8)(11,15)(13,16)(17,19)(18,25)(20,30)(21,31)(22,29)(23,26)(24,28)(27,32)(17,20,21,22)(18,26,28,27)(19,29,31,30)(23,25,32,24)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.