One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,8,5,7,13,15)(3,9,10,16,11,6,12,14)(17,18,22,28,20,26,35,27,23,25,38,44,36,43,21,37)(19,29,32,39,34,45,48,40,33,46,47,24,30,41,31,42)(1,3,5,11)(2,6,7,9)(4,12,13,10)(8,16,15,14)(17,19,23,33)(18,24,25,39)(20,30,36,34)(21,32,35,47)(22,31,38,48)(26,40,43,42)(27,45,37,41)(28,46,44,29)(2,7)(6,9)(8,15)(14,16)(18,25)(24,39)(26,43)(27,37)(28,44)(29,46)(40,42)(41,45) involution — undirected(17,20,23,36)(18,26,25,43)(19,30,33,34)(21,22,35,38)(24,40,39,42)(27,44,37,28)(29,41,46,45)(31,47,48,32)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.