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