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