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