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