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