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