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