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