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