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