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