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