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