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