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