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