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