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