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