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