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