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)(11,12)(13,14)(15,16)(17,18,22,19)(20,23,27,25)(21,26,29,24)(28,31,32,30)(1,3,5,6)(2,4,7,8)(9,11)(10,12)(13,16)(14,15)(20,27)(23,25)(28,32)(30,31)(9,12)(10,15)(11,13)(14,16)(18,19)(23,25)(24,26)(30,31) involution — undirected(1,2)(3,8)(4,6)(5,7)(9,10,14,13)(11,16,15,12)(17,19,22,18)(20,25,27,23)(21,26,29,24)(28,31,32,30)(1,4,5,8)(2,6,7,3)(9,12)(10,11)(13,15)(14,16)(17,20)(18,23)(19,25)(21,28)(22,27)(24,30)(26,31)(29,32)(1,2)(3,4)(5,7)(6,8)(9,13,14,10)(11,16,15,12)(17,21,22,29)(18,24,19,26)(20,28,27,32)(23,30,25,31)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.