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