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