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