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