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