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