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