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