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