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)(11,17)(15,20)(16,19)(22,27)(24,25)(28,35)(29,30)(31,36)(32,33)(5,7)(6,11,13,19)(8,16)(9,17)(10,15)(12,14,18,20)(21,22,25,29,26,30,24,27)(23,31,32,35,34,28,33,36)(1,3,4,2)(7,15)(11,19)(14,20)(16,17)(21,23)(22,28)(24,33)(25,32)(26,34)(27,35)(29,36)(30,31)(5,8,10,9)(6,12,13,18)(7,16,15,17)(11,14,19,20)(21,24,26,25)(22,27,30,29)(23,32,34,33)(28,36,31,35)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.