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