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