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