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