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