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