One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,3)(5,6)(7,15)(8,16)(9,12)(10,13)(11,14)(17,18)(19,20)(24,31)(26,32)(27,34)(29,35)(1,3,4,2)(5,7)(6,8)(9,20)(10,16)(11,17)(12,15)(13,18)(14,19)(21,22,25,28)(23,26,30,32)(24,27,31,34)(29,33,35,36)(5,8)(6,7)(9,15)(10,18)(11,19)(12,20)(13,16)(14,17)(21,23)(22,26)(24,29)(25,30)(27,33)(28,32)(31,35)(34,36) involution — undirected(5,9,11,10)(6,12,14,13)(7,16,17,20)(8,18,19,15)(21,24,25,31)(22,27,28,34)(23,29,30,35)(26,33,32,36)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.