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