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