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