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