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