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