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