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