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