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