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