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