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