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