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