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