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