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