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