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