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