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