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)(11,12,16,15)(18,24)(20,28)(25,27)(29,31)(1,3,4,7)(2,5,6,8)(9,10,13,14)(11,15,16,12)(17,18)(19,25)(20,26)(21,27)(22,28)(23,24)(29,32)(30,31)(1,2)(3,5)(4,6)(7,8)(9,10)(11,12)(13,14)(15,16)(17,19,23,21)(18,25,24,27)(20,29,28,31)(22,30,26,32)(11,16)(12,15)(17,20)(18,26)(19,29)(21,31)(22,24)(23,28)(25,32)(27,30) involution — undirected(1,3)(2,5)(4,7)(6,8)(9,11,13,16)(10,12,14,15)(17,21,23,19)(18,27,24,25)(20,29,28,31)(22,30,26,32)(1,2)(3,5)(4,6)(7,8)(9,12)(10,11)(13,15)(14,16)(17,22,23,26)(18,28,24,20)(19,30,21,32)(25,31,27,29)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.