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