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