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