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