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