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