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