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