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