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