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