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