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