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