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