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)(19,28)(20,32)(21,25)(22,26)(23,27)(24,31)(29,30)(1,3,4,8)(2,5,6,7)(9,10)(11,14)(12,13)(15,16)(17,19,21,30,23,20,22,31)(18,24,26,32,27,29,25,28)(10,13)(14,16)(17,20,22,30,23,19,21,31)(18,24,25,28,27,29,26,32)(9,11)(10,14)(12,15)(13,16)(17,18)(19,29)(20,24)(21,26)(22,25)(23,27)(28,30)(31,32) involution — undirected(11,15)(14,16)(17,21,23,22)(18,25,27,26)(19,30,20,31)(24,28,29,32)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.