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