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