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