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