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