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