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