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