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