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